Refractory Nuclides in the Cosmic-Ray Source

Details Refractory Nuclides in the Cosmic-Ray Source Refractory Nuclides in the Cosmic-Ray Source

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....4.1899w&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

7

Scientific paper

New observations of the abundances and energy spectra of the isotop es of Mg, Al, and Si from ACE/CRIS are used to extend our previous results on the composition of refractory nuclides in cosmic-ray source material. For the 18 nuclides considered for elements between Mg and Ni, relative source abundances are generally consistent with solar-system values to within 20%. The 58 Fe abundance, taken relative to 28 Si, is found to have the largest difference from solar, a factor of ˜ 1.6. We suggest that the compositional similarity between the cosmic-ray source and the solar system can be understood in terms of acceleration of cosmicray refractories out of a well-mixed sample of interstellar matter.

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